勃烈日涅夫去世后，继任的苏联领导人是（）。
A.斯大林
B.赫鲁晓夫
C.安德罗波夫
D.克利姆
参考答案：C
How disappointing it was that I _____ the wonderful football match. [ ]
A. may have missed
B. should have missed
C. could have missed
D. must have missed
“最近发展区”概念的提出者是（）。
A．丸维果茨基
B．皮亚杰
C．列昂节夫
D．弗洛伊德
